I would definately not mix any painkillers and alcohol. I learned the hard way.
I took like 5 hydrocodones which isnt even that much compared to oxy codone and what your talking about. After popping the hydrocodone I poured three or four shots of brandy in a cup and started sipping it. After five minutes I started throwingup like crazy. I went to sleep and woke up at 3 in the morning totally numb and I was extremely fucked up. Not worth the puking though. If you don't mind it go for it.